Congratulations for scoring this much rank in jee mains 2018.

Visit this link http://tools.collegepravesh.com/college-predictor/jee-main/   to have an idea regarding the closing ranks,cutoffs and the other colleges you can get through your rank.

You will definitely get National Institute of Technology Puducherry in Computer Science Branch.

JoSAA was launched to make the admission process faster and easier for all the students. All the students who have passed the JEE Main and JEE Advanced Exam can check for vacancy of the JoSAA’s spot round in its official website. Registration for the spot round will be done online only.

After registering for the spot round, all the candidates can choose their choice of program. The students who have cleared the JEE Main and Advanced can fill their own JoSAA choice for allotment of seats. This is the first step for registration of spot round for getting admission in the IITs and NITs. All the candidates can register for spot round and fill up their choice in their official web portal.

http://jointseatallocationauthority.in/josaa-choice-filling-jee-main/

Vist this link ,you will get to know all the details regarding choice filling.